Primordial non-Gaussianities

Abstract

This contribution gives an overview on primordial non-Gaussianities from a theoretical perspective. After presenting a general formalism to describe nonlinear cosmological perturbations, several classes of models, illustrated with examples, are discussed: multi-field inflation with non-standard Lagrangians, modulaton fields, curvaton fields. In the latter case, a special emphasis is put on the isocurvature perturbations, which could leave a specific signature in non-Gaussianities.

arXiv commentInvited talk at YKIS (Yukawa International Seminar) 2010: "Cosmology -The Next Generation-", 28 June - 2 July 2010, Kyoto, Japan

Cited by in corpus (8)

• Quantum aspects of chaos and complexity from bouncing cosmology: A study with two-mode single field squeezed state formalism
• DBI inflation with a non-minimally coupled Gauss-Bonnet term
• DBI Galileon in the Effective Field Theory of Inflation: Orthogonal non-Gaussianities and constraints from the Trispectrum
• Rescuing Quadratic Inflation
• A Modal Approach to the Numerical Calculation of Primordial non-Gaussianities
• A weak lensing view on primordial non-Gaussianities
• The Trispectrum as a Diagnostic of Primordial Orthogonal non-Gaussianities
• Mixed perturbations from an Inflaton and Two Curvatons - towards understanding non-gaussianity in more complicated curvaton scenarios